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BL5980 Dataheets PDF



Part Number BL5980
Manufacturers BELLING
Logo BELLING
Description Low Voltage Photoelectric Smoke Detector ASIC
Datasheet BL5980 DatasheetBL5980 Datasheet (PDF)

BL5980 Low Voltage Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode 1.0. INTRODUCTION 1.1 Features Low Quiescent Current Consumption Two AA Battery Operation Internal Power On Reset Local Alarm Memory Internal Low Battery detector Interconnect up to 40 Detectors 9 minute Timer for Sensitivity Control Temporal or Continuous Horn Pattern Low Battery and Chamber Test Internal Infrared Emitter Diode (IRED) driver Adjustable IRED Drive current Adjustable Hush Sensitivity Available i.

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BL5980 Low Voltage Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode 1.0. INTRODUCTION 1.1 Features Low Quiescent Current Consumption Two AA Battery Operation Internal Power On Reset Local Alarm Memory Internal Low Battery detector Interconnect up to 40 Detectors 9 minute Timer for Sensitivity Control Temporal or Continuous Horn Pattern Low Battery and Chamber Test Internal Infrared Emitter Diode (IRED) driver Adjustable IRED Drive current Adjustable Hush Sensitivity Available in SOP16 1.2 Pin Diagrams www.belling.com.cn Page- 1 - V1.1 BL5980 1.3 Description The BL5980 is a low power, low voltage photoelectric type smoke detector IC. With minimal external components, this circuit will provide all the required features for a photoelectric-type smoke detector. A check for a low battery condition is performed every 86 seconds, and chamber integrity is tested once every 43 seconds, when in Standby. The temporal horn pattern supports the NFPA 72 emergency evacuation signal. The BL5980 incorporates a gain-selectable photo amplifier for use with an infrared emitter/detector pair. An internal oscillator strobes power to the smoke detection circuitry every 10 seconds, to keep the standby current to a minimum. If smoke is sensed, the detection rate is increased to verify an Alarm condition. A high gain mode is available for push button chamber testing. An internal 9 minute timer can be used for a Reduced Sensitivity mode. An interconnect pin allows multiple detectors to be connected such that, when one unit alarms, all units will sound. the BL5980 was designed for use in smoke detectors that comply with Underwriters Laboratory Specification UL217 and UL268. 1.4 Ordering Information Order Number BL5980 Package Type SOP-16 Marking BL5980 XXXXX Packing Reel Tape Tube www.belling.com.cn Page2 V1.1 1.5 Typical Application Circuit BL5980 VSS VSS VSS 3V AA Battery C1 vss 10uF L1 10uH D1 C4 4.7uF LX(16) VBST(15) R1 C2 100 1uF VDD(3) Power for low voltage module Comparator RS PWM LATCH CLK Current Sense High frequence OSC Boost Comparator BIAS Precision Reference VDD Low Battery Comparator VSS(1) Power on Trimmed reset Oscilator IRCAP(11) C3 100uF D2 IRP(6) Programmable IRED Current IRED DRIVER IRED(2) R7 Photo 100 D3 IRN(7) Integrator GLED(9) D5 from precision reference Programmable DAC Smoke Comparator Control Logic and Timming VBST R6 330 Limits D4 RLED(8) VSS VSS R5 330 To other Units C6 33uF Push-to-TEST/HUSH VDD IO(12) Interconnect To programme every module TEST(4) Test Mode TEST2(5) Identify 44bit 44bit Allocation …… MTP and Calibration Cell Lifetime REG Data LTD Data MTP W/R ctrl VBST Horn Driver Level shift HB(13) HS(14) FEED(10) Horn C5 R3 1nF R4 200K 1.5M Note 1: C2 should be located as close as possible to the device power pins, and C1 should be located as close as possible to VSS. 2: R3, R4 and C5 are typical values and may be adjusted to maximize sound pressure. 3: Schottky diode D1 must have a maximum peak current rating of at least 1.5A. For best results it should have forward voltage specification of less than 0.5V at 1A, and low reverse leakage. 4: Inductor L1 must have a maximum peak current rating of at least 1.5A. 5: DC-DC converter in High Boost mode (nominal VBST = 9.6V) can draw current pulses of greater than 1A, and is therefore very sensitive to series resistance. Critical components of this resistance are the inductor DC resistance, the internal resistance of the battery and the resistance in the connections from the inductor to the battery, from the inductor to the LX pin and from the VSS pin to the battery. In order to function properly under full load at VDD= 2V, the total of the inductor and interconnect resistances should not exceed 0.3Ω. The internal battery resistance should be no more than 0.5Ω, and a low ESR capacitor of 10 µF or more should be connected in parallel with the battery, to average the current draw over the boost converter cycle. www.belling.com.cn Page3 V1.1 BL5980 2.0. ELECTRICAL CHARACTERISTICS 2.1 Absolute Maximum Ratings Supply Voltage ....................................................VDD=5.5V; VBST =13V Input Voltage Range Except FEED, TEST......... VIN = -0.3V to VDD +0.3V FEED Input Voltage Range................................ VINFD =-10 to +22V TEST Input Voltage Range ............................... VINTEST =-.3V to VBST+.3V Input Current except FEED.................................. IIN = 10 mA Continuous Operating Current (HS, HB, VBST).. IO= 40 mA Continuous Operating Current (IRED) ................IOIR= 300 mA Operating Temperature ......................................TA = -10 to +60°C Storage Temperature .........................................TSTG = -55 to +125°C Notice: Stresses above those listed under “Maximum ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions a.


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